Control means fob tractor



R. D. ACTON Nav, 11, 1947.

CONTROL MEANS FOR TRACTOR-CONNECTED IMPLEMENTS Original Filed March 22, 1944 6 Sheets-Sheet l Nov. 11, 1947. R. D. ACTON Re. 22,932

CONTROL MEANS FOR TRACTOR-'CONNECTED IMPLEMENTS original Filed March 22, 1944 sheets-sheet 2 ggg N e g l 07%. o w

EO. 'Iwnzor fg@ Y L Jim EN By R. D. Ac'roN Re. 22,932

CONTROL MEANS FOR TRACTOR-CONNECTED IMPLEMENTS Nov. 11', 1947.

Original Filed March 22, 1944 6 Sheets-Sheet 5 @ze @y R. D. ACTON Nov. 11, 1947.

CONTROL MEANS FOR TRACTOR-CONNECTED IMPLEMENTS Original Filed March 22, 1944 6 Sheets-Sheet 4 NOV. 11, 1947. R, D, ACTON Re. 22,932

CONTROL MEANS FOR TRACTOR-CQNNECTED IMPLEMENTS original Filed Maron 22. 1944 e sheets-sheet 5 @y owl OPM Nov. 11, 1947. R, D AC1-ON Re. 22,932

CONTROL MEANS FOR TRACTOR-CONNECTED IMPLEMENTS Original Filed March 22, 1944 6 Sheets-Sheet 6 Reissued Nov. 1 1, 1947' Re. 22,93zf

CONTROL LIEAN S FOB. TRACTOR- j CONNECTED IMPLEMENTS amel n. Acton, chime. n1., mmm t nlm-- national Harvester Company, a corporation of New Jersey Original No. 2,410,918, dated November 12. 1946,

Serial No. 528,672, March 22', 1944. Application for reissue January 25, 1947, Serial No. 724,271

44 claims.

This application is a reissue of Patent 2,410,918 which was a continuation in part of application Serial No. 407,552, illed August 20, 1941.

The present invention relates to a control means for a tractor-connected implement. -More speciilcally, it relates to duid-pressure means for controlling or adjusting a tractor-mounted or a trail-behind implement.

It is known to provide a tractor-connected implement with a huid-power device for adjusting and controlling the implement, the device being actuated by the power of the tractor. With such an arrangement there is normally a hose for iiuid running from the tractor to the implement. The disadvantage is that when the implement is disconnected from the tractor the fluid-power means must also be disconnected from the implement or from the tractor or from both, and this normally requires a disconnection of a line or conduit through which -iiuid. is passed. With the break of a fluid line there is considerable danger of loss of the fluid. In the present invention the iiuid power means is removed without breaking of the fluid-carrying line.

An object of the present invention. is to provide an improved control means for a tractor-connected implement.

Another object is the provision of a unit type' Vbehind tractor-connected implement from the tractor.

Another object is to provide a plurality of remote controls for tractor-connected implements whereby structure or elements functioning inde- (ci. s'z-so) 2 is made at the external mechanical means through which power is supplied to the cylinder of the piston. Thus, there is n'o disconnection through a iluid line, and the disadvantages of such a disconnection are avoided. Moreover a hydraulic or mechanical power-lift mechanism as supplied on vmany tractors can bev utilized toadjust ilexibly connected implements with ease and accuracy;

In the drawings:

Figure 1 shows a side view of a tractor with parts removed, and a plow connected at the rear of the tractor; t t

Figure 2 is a detail view showing the special unit of the present invention by whichthe plow is adjusted from the tractor;

Figure 3 is a sectional view taken' through a part of the tractor of Figure l;

Figure 4 is a side view generally similar to Figure 1 but with the implement omitted and a modified means for actuating the special unit shown in Figure 2;

Figure 5 is a detail view showing a modiiied form of unit;

Figure 6 is a side view of a tractor Vwith a harvesting machine attached thereto incorporating a modication of the invention in which two push tool hydraulic devices are utilized;

Figure 'l is a side view oi a tractor with a plow attached thereto having a gauge wheel, whereby two independent power-lift mechanisms may be used for regulating and lifting the plow;

pendently of each other may be separately ad- I justed.

According to the present invention, a special detachable unit comprising a iirst cylinder with a piston therein, a second cylinder with a, piston therein, and a connecting conduit is mounted so that one cylinder is upon a tractor and the other cylinder is upon or connected to an implement carried by or connected to the tractor. The piston in the cylinder on the tractor is shifted in the cylinder by power derived from the tractor power plant acting through external mechanical means on the tractor. When the implement is Figure 8 is a plan view of the tractor shown in Figure 'I with two separate power-lift cylinders indicated in dotted lines;

Figure 9 is an enlarged plan view of the central body portion of the tractor shown in Figure 8:

Figure 10 is a vertical section of the central portion of the tractor body of Figure 9 showing the hydraulic lift construction;

Figure 11 is a side elevation of the cylinder construction shown in Figure 10; and

Figure l2 is a plan view of the cylinder construction shown in Figure 11.

In the drawings, reference character ill designates a conventional type of tractor having a 'body Il, rear axle I2, and rear wheels I3 of which `in the patent to Brown 1,929,804, October 1()J to be disconnected from the tractor, the one cylinder is disconnected from the implement, and the disconnection of the cylinder and the piston on the tractor from the source of tractor power 1933. Briefly stated, a piston Il, as shown in Figure 3, is slidably mounted in the cylinder IB.

The piston is movable within the cylinder in response to iiuid under pressure supplied to the 3 cylinder by the pump I5 through ports I 6 and I9 controlled by a valve 26. The valve 20 is under control of a hand lever 2| pivoted at 22 on the tractor and connected with the valve by a rod 23 extending from the valve. There are stop shoulders 24 and 25 on the rod 23. 'I'he lever 2| is held in a central neutral position, as shown in Figure 1, by the action of springs 26 and 21 mounted upon a member 26 extending through the lever 2|. When the lever 2| is in the central neutral position of Figure 1, the valve 2|) is in a corresponding neutral position in which the ports I8 and I9 are closed, anduid within the cylinder I6 on both sides of the piston I1 is locked in the cylinder. Figure 3 shows the piston I1 to be at the right end of the cylinder I6. When the piston is to be moved to the other end, the hand lever 2| is actuated to move the valve 20, leaving the ports I 3 and I3 uncovered so that fluid under pressure may be admitted to the port I8 and allowed to escape through the port I9.

Extending from the piston I1 is a rod 29 having an enlarged portion 30 at itsend from which extends transversely a member 3| having an opening through which the rod 23 extends. The stop shoulders 24 and 25 are abutted by the member 3| as the piston I1 moves in one direction or another, and when the piston has reached the end oi' the cylinder, the member 3| will have abutted one stop shoulder and will thereby force the valve 2II into a neutral position in which both ports I6 and I9 are closed. When the piston I1 is being moved in one direction or another, the hand lever 2| must beheld away from the neutra] position so that the valve 20 opens the ports. When the hand lever 2| is released, the springs 26 and 21 immediately return the lever to a neutral position and also returnthe valve 2n to a. neutral position. Thus, movement of the piston I1 is stopped. With the valve 2U in neutral position the ports I8 and I9 are closed so that fluid is neither admitted to the cylinder nor allowed to escape therefrom, and the piston is held locked. In this way the piston may be moved from one end of the cylinder to the other and may be locked in any desired position either at the ends of the cylinder or at any point intermediate the ends.

The tractor Il carries a draw-bar 32 to which a plow 33 is iloatingly connected. The plow 33 comprises beams 34, plow bottoms 35, wheels 36, 31, and 36 connected by cranks 39, 4I), and 4I. The cranks are interconnected by means of links 42 and 43 and a lever 44. Figure 1 shows the plow bottoms in working position. When the plow is to be transported, the cranks 39. 4|), and 4| by which the wheels are connected are swung with respect to the plow bottoms 34 so that the beams are raised. Raising of the plow to transport position is accomplished by a special iiexible unit now to be described.

As seen in Figure 1 and 2, this unit comprises a structure having a cylinder 45 with a plunger in the form of a piston 46 slidable therein, a structure having a cylinder 41 with a plunger in the form of a piston 48 slidable therein, a spring 43 urging the piston into the position shown in Figure 2, and a conduit 59, which serves to coniine a pressure or power-transmitting medium, connecting the two cylinders. The cylinder 41 is connected to the plow 33, as indicated at A rod 52 connected with the piston 48 extends from the cylinder 41 and is connected at 53 with a bell crank54 pivoted at 55 on a bracket 56 secured to the plow l 34. The bell crank 54 is connected with the w axle 39 by a link 51. The cylinder 45 is connected at 58 to a bracket 59 secured to a structure 60 at the rear of the tractor I0. A rod 6I `connected with the piston 46 extends from the cylinder 45 and is connected at 62 to a lever 63 pivoted at 64 on the tractor I6. The lever 63 is connected with the rod 29 attached to the piston I1 by means of a link 65. Fluid, as indicated at 66, is contained in the cylinder 45, the conduit 5U, and the cylinder 41. By virtue of the connection between the piston I1 in the cylinder I6 and the piston 46 in the cylinder 45 movement of the piston I1 in the cylinder I 6 under the action of fluid under pressure supplied to the cylinder I6 by the pump I5 is transmitted to the piston 46. Thus, as the piston I1 is moved from the extreme right position of Figure 3, it serves to move the piston 46 from the extreme left position of Figure 2. As the piston 46 moves from this position, the fluid 63 is forced from the cylinder 45 through the hose 50 into the cylinder 41, and the piston 4-8 is moved to the right against the action of the spring 49.

Thus, the crank axles 39, 4|), and 4I are caused to rotate so that the plow 33 is raised. When the plow is to be lowered, the piston I1 is moved to the right and the piston 46 to the left. Thus, the piston 48 may also move to the left under the action of the spring 49 and the weight of the plow bottoms 35, and the plow bottoms 35 are permitted to engage the ground again. As previously stated, the piston I1 may be held in any position intermediate the ends of the cylinder I6. Consequently, the pistons 46 and 48 will be held in an intermediate position, and the plow bottoms'35 may assume a position intermediate the lowest working position and the highest transport position. In this way the operating depth of the plow bottoms 35 may be controlled.

The cylinders 45 and 41 with their vpistons and rods and the conduit 50 may be considered as a special unit which is disconnectable from the tractor III and the plow 33, as shown in Figure12. Obviously, all that is required for this disconnection is the disconnection of the cylinder 41 from the point 5I on the plow, the disconnection of the rod 52 from the bell crank 54, the disconnection of the cylinder 45 from the point 58 on the tractor, and the disconnection of the rod 6I from the lever v63. Thus, removal of the unit is possible without a breaking of the fluid line, and this is possible because external mechanical means connects the cylinder 45 and piston 46 and the tractor power plant which may be regarded as the power takeoff shaft I4, the pump I5, and the cylinder I6. This external mechanical means may be considered lto be the link 65 and lever 63 connecting the rod 29 and rod 6| attached to the piston I1 and piston 46, respectively.

Figure 4 shows the cylinder 45 and the piston 46 connected to a different form of tractor-actuated power means. As shown in this gure, the actuated power means is a crank 61 which is rotated between extreme positions apart by mechanical or by fluid power means, as shown in the patent to Johnston 2,039,891, May 5, 1936. With this type of actuating means the crank 61 can be locked or held only in two extreme positions, and thus fOr an adjustment of the positions between which the plow or other implement connected to the tractor can be shifted, a shifting of the cylinder 45 is required. As seen in Figure 4, the cylinder 45 is connected at 66 to one arm of a bell crank 69 pivoted at 1I) on a tractor draw-bar 1|. The other arm of the bell crank 69 is connected to a nut 12 threaded upon a crank 13 adjustably secured to the draw-bar 1| by nuts 14. By means of the crank 19 there may be a lowering or raisins oi' the one arm of the bell crank 99 and a horizontal shifting of the other arm of. the bell crank 99 to which' the cylinder 45 is attached. Thus, forthe two extreme positions of the crank 91 there is adjustment of the extreme positions of the piston 49 within the cylinder 45 and an adjustment of the extreme positions of the piston within the cylinder on the implement, not show.

Figure 5 Yshows a modified form of detachable unit in which the cylinders 45 and 41 are connected by two conduits 59. Thus, the spring 49 oi' the device of Figure 2 which insures the movement of the piston 49 to the left end of the cylinder 41 is unnecessary, for the shifting of the piston 49 in either direction causes a correspondm shifting in either direction of the piston 4a, since there is pushing by fluid in both directions. In the modications shown in Figures 6 and 7, a tractor is utilized having a double power lifting arrangement as shown in Figures B, 9, 19, 11, and l2. In said figures, the rock-shafts and the independent cylinders are clearly shown as well as certain significant parts of the operating means which provide for independent manual operation of either of the lifting arms. The details of the valves are not shown in detail, as this in- The tractor shown in Figures 6 to 10, inclusive, 1

includes a. narrow central body portion 15 and a rear body portion 19 from which extended rear axle structures 11 extend. Traction wheels 19 are mounted on axles carried by the axle structures 11. Certain other parts of the tractor are shown including an operators station 19, a. gasoline tank 99, a steering column support 9|, a steering column 92, and av steering wheel 99. As indicated by dotted lines in Figures '1, 8, and 9, the central'body portion 15 contains a pair of power lifting cylinders 94. Each of said cylinders is pivotally connected to afbracket 95 rigid with respect to the body portion 15. Each of the cylinders, as shown in Figures 9 and 10, is also provided with a conventional piston 99 connected by a piston rod 91 with a crank arm 99 carried by a sleeve 99. The sleeve 99 is secured to a shaft 99 rotatably mounted in a journal portion 9| formed in the casting of the body portion 15. A power lift arm 92 is connected to each of the shafts 99. It will be understood that the lifting arm 92 -may be connected at any angular position on the shaft 99 either extending upwardly or downwardly, both positions being illustrated in Figure 'l by the lifting arms at opposite sides of the tractor.

Figures 10, 11, and 12 show some of the details of a follow-through type of lifting mechanism disclosed and claimed in the application previously referred to. Such a mechanism is particularly adapted for use with the push-pull hydraulic mechanism for implements which forms the subject-matter of the invention of this application. Referring to Figure 10, a source of fluid pressure such as a pump mounted on the tractor and driven by the power plant thereof supplies fluid under high pressure through a conduit 93 to a. -conduit 94 which leads to a distributing chamber 95. From said chamber the fluid under high pressure is delivered from a conduit 99 to a valve mechanism for controlling the delivery of fluid to and=from either end of the cylinder. Fluid released from the cylinder at low pressure is delivered through a conduit 91 to the distributing chamber and therefrom through a conduit, not shown, to a low pressure conduit 99 which leads back to the source of fluid under pressure.

and to simultaneously release fluid from the other end of the cylinder. The control member 99 is also provided with a pair of extensions |92 which carry a rod |99 on which a member |94 is mounted, said member depending downwardly as best shown in Figure 11. Said member |94 is provided with a pin |95 which slidably rides in a slot |99. Said slot is formed with two spaced parallel portions |91 and an angular portion |99 Joining the parallel portions. Said slots are formed in a followmember |99, which is connected to the pivot Din ||9 which joins the connecting rod 91 and the arm 99.

, 'I'he member |94 is slidable on the rod |99 and is connected to an actuating member which is pivotally connected to a lever ||2 pivoted on the body portion 15 forwardly of the pivot axis of the shaft 99. An actuating rod H9 is pivotally connected to the. upper end of the lever ||2 and to the lower end of a manually rockable lever ||4 pivoted on a bracket I|5 carried by the steering column support 9|. 'Ihe lever I |4 is shiftable over a quadrant ||9. The position oi' the lever on the quadrant through the linkage above de.- scribed determines. the positionof the member |94. When the lever ||4 is moved, the member |94 depending upon its direction of movement rides up the angular slot |99 into the slot |96 to operate the cylinder to move the corresponding lifting arm 92 in one position. When the member |94 is moved in the other direction into the slot |99, the lifting arm 92 is moved in the other direction. Following movement of the member |94 out of its neutral position midway of the angular slot |99, the piston moves until the follow member |99 moves to the extent that the pin |95 is again located in the central portion of the slot |99. This construction enables the operator to preselect any predetermined position of the arm 92 by moving the lever ||4 to a corresponding position. As there are two complete lifting cylinders, each having its lifting arm 92 and manual control lever I4, it is to be understood that either maybe independently operated at any time.

Referring to Figure 6, a bracket structure ||1 at the rear of the body portion 16 of the tractor extends upwardly including two brackets ||9 and |I9. An hydraulic cylinder |29 is pivotally connected to the bracket H9, a piston |2| in the cylinder having a piston rod |22 extending from the cylinder and pivotally connected to one of the lifting arms 92. A second cylinder |23 is pivotally connected to the upper bracket I|9. A piston |24 in the cylinder |23 has a piston rod |25 extending forwardly to a point of pivotal connection to the second lifting arm 92. v

A flexible conduit |29 connected to the cylinder |29 extends rearwardly to a point of connection with a cylinder |21. A flexible conduit |29 extends rearwardly to a. point of connection with a cylinder |29.

A harvester thresher illustrated in outline has been shown as being connected to the tractor at the rear thereof. Said harvester thresher, in-

dicated in its entirety by the reference character |30, is carried on supporting wheels provided with rubber tires, one of which |3| is shown in the drawing. A frame structure |32 extending. forwardly from the harvester thresher is connected by a pin |33 Witha draw-bar structure |34 rigidly secured to the rear axle extension 11 of the tractor. The harvester thresher is conventional in the art and includes principally a, thresher part |36 and a harvester part |36 pivotally mounted at |31 on the thresher part. A reel structure includes a frame |38, one side of which is shown 'in the drawing, is pivotally connected at |40 to theharvester part |36. A reel |4| is rotatably carried by the frame |38. Said reel is mounted on a shaft |42 journaled in brackets |43 mounted on the forwardly extending portions of the frame |38. A bracket |43', mounted on a portion of the frame structure |38, provides an attachment point for a piston rod |44 connected to aV piston |45 mounted in the cylinder |28. The cylinder itself is pivotally connected at |46 to the harvester part |36 at a point spaced from the pivotal connecting point |40 of the reel frame. It will be understood, therefore, that the movement of the piston |45 relative to the cylinder |29 vertically adjusts the reel structure with respect to the narvester part |36. Such adjustment is neces- ;ary during the operation of a harvester thresher iue to the adjustment of the harvester part which will be hereinafter described and due to the height and type of grain being harvested.

'I'he cylinder |21 is pivotally connected at |41 with a bracket |48 depending downwardly from the draft frame structure |32. A piston |49 in the cylinder |21 is provided with a piston rod |50 which is pivotally connected at |I with the harvester part |36. It will be understood that any movement of the piston |49 relative to its cylinder |21 will vertically adjust the harvester part |36. 'I'his adjustment is necessary in the operation` of a harvester thresher and is frequently used during passage through the field due to the variation in the type of grain and the type'of undergrowth in the grain.

When an operator is harvesting grain with the tractor implement combination shown in Figure 6, he has at his complete control the vertical adjustment of the reel and the harvester part with respect to the other and with respect to the ground level. Due to the use of flexible conduits |26 and |28, any mechanical connections are avoided, and the pivot point of the draft frame |32 on the tractor relative to controlling mechanism need be given no consideration. Moreover it is unnecessary to extend long and complicated mechanical controls from the trailing implement to the tractor.` 'I'he operator has at Ahis command, by merely moving the control lever ||4, the exact position of the reel with respect to the harvester part |36 and the position of the harvester part |36 with respect to the ground. A tractor having built in power lifting mechanisms may be utilized, the push-pull hydraulic units which make possible the use of mechanical lifting arms being entirely independent from the tractor power lift system.

In the modification of Figure 7, amoldboard plow is shown as being directly connected to the tractor. 'Ihe frame structure |52 of the plow, which includes beams |53 and |54, is quickly connected to an attaching structure |55 which is in turn rigidly secured to the rear axle structure 11 of the tractor. Conventional plow bottoms |56 are mounted on the plow beams |53 and |54.

A gauge wheel |51 is oatingly connected by a link |50 with the frame structure of the plow. A link |59 pivotally connected to the link |58 extends upwardly, being pivotally connected to a bell-crank |60 pivoted on the frame |52 of the plow.

A cylinder 6| pivotally connected to an upstanding bracket |62 on the rear plow beam |53 carries a piston |64 which is secured to a piston rod |65. Said piston rod is pivotally secured to the lever |60. This construction provides for adjusting the gauge wheel |51 relative to the frame structure ofthe plow by any movement of the piston |64 relative to the cylinder |6I, thereby regulating the operating depth of the plow. A flexible conduit |66 connected to the cylinder |6|. extends to the tractor where it is connected with a cylinder |61.v Said cylinder is pivotally connected at |68 vwith a bracket carried by the rear axle 11 of the tractor. A piston |63 mounted in the cylinderl |61 has a forwardly extending piston rod |10 which is pivotally connected to one of the lifting arms -92 which in this construction extends downwardly from its shaft '90. When the arm 92 moves in a clockwise direction, fluid in the cylinder |61 is compressed and forced under pressure into the cylinder |6| moving the piston |64 forwardly and pushing down the gauge wheel |51 thereby raising the plow bottoms |56. When the lifting arm 92 is moved by its hydraulic actuating mechanism .plowing operations.

in an anti-clockwise direction, the weight of the plowinoves the piston |64 rearwardly allowing the plow to operate at greater depth.

A bracket structure, including members |1| and |12 connected to the attaching structure |55, extends rearwardly to form a support for a transverse rock-shaft |13. Saidrock-shaft carries an upwardly extending arm |14 which is connected by a link |15 with one of the lifting arms 92. A rearwardly extending arm |16 carried by the shaft |13 is provided with a. pin |11 slidable in a slot 18 formed in a member |19. Said member has a downwardly extending portion, which is connected with a bracket 8| secured to the frame |52 of the plow. By movement of the lifting arm 82 in a clockwise direction, the arm |16 is moved upwardly, the pin |11 sliding in the slot |18 until it reaches the upper end of said slot. 'I'he entire plow structure, including its gauge wheel, is then lifted from operating position clear of the ground. The slot |18 is of such length as to provide for floating movement of the plow and its gauge wheel during normal Said slot, however, serves as stop means to prevent excessive dropping of the plow due to holes or due to extremely soft conditions when the gauge wheel |51 is not effec-tive in suporting the plow.

In the modification of Figure 7, it will be noted that the operator, by means of the two control members [4 which are within easy access of his reach, can adjust the plow at any time during operation and can with equal ease lift the plow completely from the ground Without disturbing the depth adjustment. This is particularly significant in plowing operations as the plow must -be removed from the ground before turning and as it is important to again operate at the same depth without readjustment.

It will be apparent from the foregoing description that novel means have been devised for controlling either an implement directly connected to a tractor or one pulled therebehind in trailing relation. 'I'his means utilizes in combination a hydraulic iiuid system complete in itself with a mechanical member forming part of a tractor power lift mechanism. It enables an operator to use a tractor having any type of power lift mechanism in conjunction with an implement which must be controlled during operation of the tractor. The degree of control obtainable depends upon the characteristics of the tractor power lift mechanism, several types of which are disclosed in this application. Figure 4, for example, shows the simplest type of power lift mechanism now in extensive use. In this mechanism only two positions are obtainable by a half revolution mechanical or hydraulic type of power lift. For that reason a manual adjustment was provided in said construction. Figures 1, 2, and 3 illustrate a construction in which a two-Way hydraulic power lift mechanism is provided on the tractor with two-way power being supplied to an implement by means of positive fluid pressure in one direction and spring pressure in the other direction. Figure 5 illustrates another type of pressure applying means for use with the two-way power lift mechanism of Figure 3 in which power may be applied positively in both directions. In the power lift construction of Figures 6 to 12, inclusive, two power lift mechanisms are provided of the follow-through type in which the operator may manually select the position of the power lift arms with the power lift mechanism following and throwing out automatically when the selective point is reached. This two-unit type of mechanism provides for use of the device of the invention with an lmplement where it is necessary in order to control the implement to independently adjust two different elements of the implement. Two uses of this arrangement are shown in Figures 6 and 7.

The outstanding utility of a device as disclosed in the various modifications is that the hydraulic actuating system may be provided as an attachment which is complete within itself and which does not require connection into the hydraulic system of a hydraulic lift mechanism. Breaking of the iluid conduit or leakage does not aiect the tractor power lift mechanism. Moreover these units may be used at different times, on diilerent tractors, and on different implements by merely providing the necessary attaching brackets.

It is the intention to limit the invention only within the scope of the appended claims.

What is claimed is:

1. In combination with a tractor having a power-actuated member thereon, an implement connected to the tractor for free floating movement relative thereto, said implement having a functional implement part and a member movable to adjust said implement part, means for locking said power-operated member in any one of a plurality of positions, and a unitary selfcontained hydraulic unit including a cylinder mounted on the tractor and a piston in the cylinder secured to the power-actuated member, a cylinder secured to the implement having a piston therein secured to the implement-adjusting member, and flexible fluid conduit means connecting said cylinders whereby the functional implement part may be accurately adjusted and maintained in adjusted position by the poweractuated member on the tractor during movement of the tractor and movement of the implement relative to the tractor.

2. A hydraulic adjusting device for tractor-attached implements comprising, in combination with a tractor and an implement connected thereto, a power-actuated adjusting member on the tractor, a manually operable means for controlling the application of power from the power plant of the tractor to said member, said means being operable to automatically disengage the power means when said member reaches either of two extreme positions and to be manually operable to disengage the power means at a plurality of intermediate positions, a cylinder connected to the tractor, a piston mounted in said cylinder and secured to said adjusting member, said member being operable to reciprocate the piston within the cylinder, an adjusting member connected to an implement part to be adjusted, said member being operatively connected to a piston, a cylinder in which said piston is mounted for reciprocation, said cylinder being connected to the implement, conduit means extending from the first-mentioned cylinder to the second-mentioned cylinder, said conduit being eifective to deliver iiuid under pressure developed during the compression stroke of the power-operated piston on the tractor to apply pressure to one side of the piston in the second-mentioned cylinder, and spring means mounted in the second-mentioned cylinder to apply pressure against the piston in a direction opposite to the force applied by the iluid pressure, one of said cylinders being full of fluid when the other is empty, whereby by means of the spring pressure the two cylinder and piston arrangements and the conduit connecting the two form a push-pull device whereby the adjusting member for the implement follows the movement of the power-'actuated member on the tractor.

3. In combination, a tractor having a power plant, an implement oatingly connected to the tractor, said implement having a functional implement part adjustably mounted thereon, a unit having one end mounted upon the` tractor and the other end mounted upon the implement and readily detachable therefrom for adjusting the implement by force applied at the tractor, said unit having conduit means extending from the tractor to the implement, a first movable part at the end of the conduit means on the tractor, a second movable part at the end of the conduit means on the implement, and a iluid contained in the conduit means such as to cause movement of the first movable part to effect movement of the second movable part, means connecting the second movable part and the implement, external shiftable mechanical means onv the tractor for moving the first Dart and therewith the second movable p art for adjustment of the implement,

and means connecting `the external means and the tractor power plant and including a, cylinder, a piston slidably mounted within the cylinder, means connecting the piston and the external mechanical means, and means for supplying uid to the cylinder to shift the piston and for locking the uid withinthe cylinder to prevent movement of the piston in any one of a plurality of positions.

4. In combination, a. tractor having a power plant, an implement iloatingly connected to the tractor, said implement having a functional implement part adjustably mounted thereon, a unit having one end mounted upon the tractor and the other end mounted upon the implement and readily detachable therefrom for adjusting the implement by force applied at the tractor, said unit having conduit means extending from the tractor to the implement and a fluid contained 11 in the conduit means such as to cause a force applied to the end of the unit on the tractor to be transmitted by the iiuid to the end of the unit on the implement, means connecting the end of the unit on the implement to the implement, external mechanical means on the tractor for applying force to the end of the unit on the tractor and therewith force to the end of the unit on the implement for adjusting the implement, and means connecting the tractor power plant and the external mechanical means and including a. cylinder, a piston slidably mounted within the cylinder, means connecting the piston and the external mechanical means, and means for supplying uld to the cylinder to shift the piston and for locking the fluid within the cylinder to prevent movement of the piston in any one of a plurality of positions.

5. In combination, a tractor having a power plant, an implement oatingly connected to the tractor, said implement having a functional implement part adjustably mounted thereon, a readily detachable unit for adjusting the implement by force applied at the tractor, said unit comprising a'first device mounted upon the tractor and composed of a cylinder and a piston slidable therein, a second device mounted upon the implement and composed of a cylinder and a piston slidable therein, a conduit connecting the devices, and iluid contained in the conduit and the cylinders, means connecting the piston of the second device and the implement, external mechanical means connected with the piston of the first device for shifting the same and therewith the piston of the second device for adjusting the implement, and means connecting the external mechanical means and the tractor power plant and including a cylinder, a piston slidably mounted within the cylinder, means connecting the piston and the external mechanical means, and means for supplying uid to the cylinder to shift .the piston and for locking the iluid within the cylinder to prevent movement of the piston in any one of a plurality`of positions.

6. In combination, a tractor having a power plant, an implement loatingly connected to the tractor, said implement having a functional implement part adjustably mounted thereon, a readily detachable unit for adjusting the implement by force applied at the tractor, said unit compris- /ing a first device mounted upon the tractor and composed of a cylinder and a piston slidable therein, a second device mounted upon the implement and composed of a cylinder and a piston slidable therein, a, conduit connecting the devices, and iiuid contained in the conduit and the cylinders, means connecting the piston of the second device and the implement, external mechanical means connected with the piston of the rst device for shifting the same and therewith the piston of the second device for adjusting the implement, and means connecting the external mechanical means and the tractor power plantl and comprising means for holding the piston of the rst device in any one of a plurality of positions between the ends of the cylinder of the first device for holding the piston of the second in any one of a plurality of positions between the ends of the cylinder of the second device thereby to hold the implement in any one of a plurality of positions of adjustment.

'7. In combination, a tractor having a power plant, an implement iloatingly connected to the tractor, said implement having a functional irnplement part adjustably mounted thereon, a unit l 12 having one end mounted upon the tractor and the other end mounted upon the implement for adjusting the implement by force applied at the tractor, said unit having conduit means extending from the tractor to the implement, a first movable part at the end of the conduit means on the tractor, a second movable part at the end of the conduit means on the implement, and a fluid contained in the conduit means such as to cause movement of the first movable part to eiect movement of the second movable part, means connecting the second movable part and the implement, external shiftable mechanical means on the tractor for moving the iirst part and therewith the second movable part for adjustment of the, implement. and a fluid-power device connected with the tractor power plant for shifting the external mechanical means.

8. In combination, a tractor having a power plant, an implement iloatingly connected to the tractor, said implement having a functional implement part adjustably mounted thereon, a unit having one end mounted upon the tractor and the other end mountedupon4 the implement for adjusting the implement by force applied at the tractor, said unit having conduit means extending from the tractor to the implement and a, fluid contained in the conduit means such as to cause a force applied to the end of the unit on the tractor to be transmitted by the uid to the end of the unit on the implement, means connecting the end of the unit on the implement to the implement, external mechanical means on the tractor for applying force to the end of the unit on the tractor and therewith force to the end of the unit on the implement for adjusting the implement, and a fluid-power device connected with the tractor power plant for actuating the external mechanical means.

9. In combination, a tractor having a. power plant, an implement floatingly connected to the tractor, said implement having a functional implement part adjustably mounted thereon, a unit for adjusting the implement by force applied at the tractor, said unit comprising a rst device mounted upon the tractor and composed of a. cylinder and a pistonslidable therein, a second device mounted upon the implement and composed of a cylinder and a piston slidable therein, a conduit connecting the devices, and iluid contained in the conduit and the cylinders, means connecting the piston of the second device and the implement, external mechanical means connected with the piston of the rst device for shifting th e. same and therewith the piston of the second device for adjusting the implement, and a fluid-- power device connected with the tractor power plant forv shifting the external mechanical means.

10. The combination specied in claim 9, and further including resilient means for urging the piston of the second device in one direction in its cylinder.

11. In combination, a tractor having a powei` plant, an adjustable implement connected to the tractor, a readily detachable unit for adjusting th'e implement by force applied at the tractor, said unit comprising a first device mounted upon the tractor and composed of a cylinder and a piston slidable therein, a second device mounted upon the implement and composed of a cylinder and a piston slidable therein, a first conduit connecting the cylinder at one side of the piston of the first device and the cylinder at one side of the piston of the second device, a second conduit connecting the cylinder at the other side of the piston of the rst device and the cylinder at the other side of the piston of the second device, and iiuid contained in the conduit and the cylinders, means connecting the piston of the second device and the implement, and external mechanical means connected with the piston of the ilrst device for shifting the same and therewith the piston of the second device for adjusting the implement, and a duid-power device connected with the tractor power plant for actuating the external mechanical means to shift the piston con.- nected therewith.

12. `In combination, a tractor having a power plant, a ground supported implement having an adjustable working part thereon floatingly connected to the tractor, a unit having one end mounted upon the tractor and the other end mounted upon the implement for adjusting the implement by force applied at the tractor, said unit having conduit means extending from the tractor to the implement and a force-transmitting means contained in the conduit means such as to cause a force applied at the end of the unit on the tractor to be transmitted to the end of the unit on the implement, means connecting the end of the unit on the implement to the implement, external mechanical means on the tractor for applying force to the end of the unit on the tractor and therewith force to the end of the unit onthe implement for adjusting the implement, and a fluid-power device connected with the tractor power plant for actuating the external mechanical means to apply force to the unit.

13. In combination with a tractor having a pair of independently operable power-actuated members thereon and manual control means for independently adjusting said menbers to a plurality of positions and to lock said members in any one of the selected positions, an implement connected to the tractor, mechanical lifting linkage mechanism connecting said implement to one of said power-actuated members, said implement having an adjustable implement part thereon, and a hydraulic unit including a. iirst cylinder element and a piston element therein, one of said elements being secured to the implement part to be adjusted, a second cylinder element and a piston element therein, one of said elements being connected to the tractor and the other to one of the power-actuated members thereon, and a flexible fluid conduit connecting said cylinders.

14. In combination with a tractor having an operators station and a power-actuated member thereon and manually operable control means adjacent the operators station for shifting said member to any one, of a plurality of selected positions, an implement connected to the tractor having a portion adjustable relative to the tractor, a unitary self-contained hydraulic unit including a rst cylinder element and a piston element, one of said elements being mounted on the tractor and the other element being secured to the power-actuated member, a second cylinder element and a second piston element mounted therein, one of said elements being connected to the portion of the implement to be adjusted and the other element being connected to a member with respect to which said implement portion is to be adjusted, anda flexible conduit connecting said cylinders.

15. In combination with a tractor having a power-actuated member thereon and manually operable control means l)for shifting said member to any one ot a plurality of positions and locking the member in the selected position, a groundpiston element, one of said elements being mount- 1 ed on the tractor and the other element being secured to the power-actuated member, said hydraulic unit also including a second cylinder and a. second piston mounted therein, one of said elements being connected to the gauge means Iand the other element being connected to the implement, and a ilexible conduit connecting sai cylinders. l

16. In combination with a tractor having a power-actuated lifting and adjusting member thereon and manually operable means to control the position of said member and to lock it in any one of a plurality of adjusted positions, a ground supported implement iioatingly connected to the tractor, said implement having an adjustable implement part and a movable member operative to adjust said implement part and a unitary self-contained hydraulic unit including a cylinder element and a piston element. one of said elements being secured to the tractor and the other elementbeing secured to the power-actuated member, said hydraulic unit including a second cylinder element and a second piston element mounted therein, one of said elements being secured to the implement and the other to the implement-adjusting member, and a iiexible iluid conduit member connecting said cylinders whereby adjustment of the implement part from the tractor is accurate and remains in adjusted position for any position of the implement with respect to the tractor.

17. In combination with a tractor having a power-actuated motor thereon and manually operable means to control the position of said member and to lock it in any one of a plurality of adjusted positions, an implement connected to the tractor and having a movable implement part, 45 a movable member to adjust said implement part,

and a unitary self-contained hydraulic unit including a cylinder element and a piston element therein, one of said elements being secured to the tractor and the other element being secured 5o to the power-actuated member thereon, said hydraulic unit including a second cylinder element and a second piston element mounted therein,

one of said elements being secured to the im-l plement and the other to the implement-adjusting member, said cylinders and pistons being constructed for iiuid pressure at either side of the piston, and a pair of exible fluid conduits connecting said cylinders on opposite sides of the pistons.

18. In a tractor-'implement combination, a tractor having a power-lift mechanism thereon including a selectively movable member, an implement frame pivotally connected to the tractor and having a plow connected thereto, gauge 35 means pivotally connected to said frame, and a hydraulic power-lift device including a rstcylinder element and a. piston element, one of said elements being connected to the gauge means and the other to the frame, a second cylinder element and a second piston element, one of said elements being connected to the tractor and the other to one of the movable members, and a exible conduit connecting said cylinders and adapted to transmit uid pressure from one to the other.

19. In a tractor-implement combination, a tractor having two independently operable powerlift mechanisms thereon, each mechanism including a. selectively movable member, an implement frame pivotally connected to the tractor and having a plow connected thereto, gauge means pivotally connected to said frame, a hydraulic power-lift device including a rst cylinder element and a piston element, one of said elements being connected to the gauge means and the other to the frame, a second cylinder element and a second piston element, one of said elements being connected to the tractor and the other to one of the movable members, and a flexible conduit connecting said cylinders and adapted to transmit fluid pressure from one to the other, and a second power-lift device connected to the other selectively movable member and to the implement frame for lifting the same.

20. A tractor-implement combination including a tractor having a pair of independently-operable, selectively movable power-liit members thereon, an implement frame pivotally connected to the tractor, said frame having a tool connected thereto, lifting means for the frame including linkage connected directly to one of said power-lift members, said linkage including a lostmotion connection to permit floating movement of the frame relative to the tractor during operation, gauge means carried by said frame and adjustable vertically to gauge position of the tool relative to the ground, linkage carried by the frame for adjusting said gauge means, and a hydraulic mechanism including a cylinder and piston connected between the tool and to the gauge means linkage, a cylinder and a piston connected between a point on the tractor and one of the lifting members, and iiexible iluid conduit means connecting the two cylinders for transmitting pressure therebetween.

21. A tractor-implement combination including a tractor having a pair of independently operable, movable power-lift members thereon, a'plow pivotally connected to the tractor, lifting means for the plow including linkage connected directly to one of said power-lift members, said linkage including a lost-motion connection to permit floating movement of the plow relative to the tractor during operation, a gauge wheel carried by said plow and adjustable vertically to gauge the operating depth of the plow, linkage carried by the plow for adjusting said gauge wheel, and a hydraulic mechanism including a cylinder and piston device mounted on the plow and connected to the gauge-wheel linkage, a 1

cylinder and apiston device mounted on the tractor and connected to one of the lifting members, and exible fluid conduit means connecting the two cylinders for transmitting pressure therebetween. v

22. In combination, a tractor having an operators station thereon, an implement lifting and adjusting member on the tractor, means operated by the power plant of the tractor for selectively moving said member, control means for said means located adjacent the operators station, said means beingr operable to select any position of said power actuating member, a mobile ground supported implement floatingly connected to said tractor to be drawn thereby, said implement including an adjustable functional implement part', means on said implement for regulating the operating position of said implement part, an adjusting element on said implement connected to said last named means,

hydraulically operated adjusting means mounted on the implement and connected to said adjusting element and hydraulic means for supplying regulating and adjusting power from the tractor to the implement, said hydraulic means being readily removable from the tractor whereby the implement may be detached from the tractor with the hydraulic controls, said means including a cylinder and a piston mounted on the tractor with the cylinder connected to the tractor and the piston connected to the power actuated member thereon and a fluid conduit connecting said cylinder with the hydraulic unit on the implement for transmitting Iluid power thereto through the exible conduit' whereby accurate adjustment of the implement part may be obtained and maintained during travel of the tractor and during movement of the implement in any direction relative to the tractor.

23. In combination, a tractor having an operators station thereon, an implement lifting and adjusting member on the tractor, means operated by the power plantof the tractor for selectively moving said member, control means for said means located adjacent the operators station, said means being operable to select any position `of said power actuating member, an implement connected to said tractor to be drawn thereby, said implement including an adjustable functional implement part, means on said implement for regulating the operating position of said implement part, an adjusting element on said implement connected to said last named means, hydraulically operated adjusting means mounted on the implement and connected to said adjusting element and hydraulic means for supplying regulating and adjusting power from the tractor to the implement, said hydraulic means being readily removable from the tractor whereby the implement may be detached from the tractor with the hydraulic controls, said means including a cylinder and a piston mounted on the tractor with the cylinder connected. to the tractor and the piston connected to the power actuated member thereon and a fluid conduit connecting said cylinder with the hydraulic unit on the implement for transmitting fluid power thereto through the flexible conduit whereby accurate adjustment of the implement part may be obtained and maintained during travel of the tractor.

24; In combination, a tractor having an operators station thereon, an implement lifting and adjusting member on the tractor, means operated by the power plant of the tractor'for selectively moving said member, control means for said means located adjacent the operators station, said means being selectable to determine any position of said power actuating member, a mobile ground supported implement oatingly connected to said tractor to be drawn thereby, said implement including an adjustable functional implement part, means on said implement for regulating the operating position of said implement part, an adjusting element on said implement connected to said last named means, hydraulically operated adjusting means mounted on the implement and connected to said adjusting element and hydraulic means for supplying regulating and adjusting power from the tractor to the implement, said hydraulic means being readily removablel from the tractor whereby the implement. may be detached from the tractor with the hydraulic controls, said means including a cylinder and a piston mounted on the tractor with the cylinder connected to the tractor and the piston connected to the power actuated member thereon and a. iluid conduit connecting said cylinder with the hydraulic unit on the implement for transmitting uid power thereto through the flexible conduit whereby accurate adjustment oi' the implement part may be obtained and maintained during travel of the tractor and during movement of the implement in any direction relative to the tractor.

25. In combination, a tractor having an operators station thereon, a hydraulically operated implement lifting and adjusting member on the tractor, hydraulically operated means for selectively moving said member, manual control means for actuating said hydraulic means located adjacent the operator's station, said means being selectable by the operator to determine any position of said power actuating member, a mobile ground supported implement floatingly connected to said tractor to be drawn thereby, said implement including an adjustable functional implement part, means on said implement for regulating the operating position of said implement part, an adjusting element on said implement connected to said last named means, hydraulically operated adjusting means mounted on the implement and connected to said adjusting element and power transmitting means for supplying, regulating and adjusting power from the tractor to the implement without the continuity of fluid lines from the tractor hydraulically operated means'whereby the implement may be detached from the tractor with the hydraulic adjusting means without making or breaking liquid connections with the hydraulic means on the tractor, said means including a cylinder and a piston mounted on the tractor with the cylinder connected to the tractor and the piston connected to the power actuated member thereon and a iluid conduit connecting said cylinder with the hydraulic unit on the implement for transmitting fluid power Ithereto through the flexible conduit whereby accurate adjustment of the implement part may be obtained and maintained during travel of the tractor and during movement of the implement in any direction relative to the tractor.

26. In combination with a tractor having an operator's station thereon, a. power actuated member on the tractor, means operated from the power plant of the tractor operating said member, means accessible to an operator on said station. for controlling said operating means and thereby controlling the position of said power actuated member, means for locking said power operated member in any one of a plurality of ad- `justed positions, an implement connected to the tractor for movement relative thereto in a plurality of directions, an implement part connected to said implement and movable relative thereto, a member on said implement and connected to said implement part movable to adjust said implement part to thereby control its working position, and a unitary self-contained hydraulic unit including a cylinder mounted on the tractor and a piston in the cylinder secured to the power actuated member, a cylinder secured to the implement having a piston therein secured to the implement adjusting member and flexible fluid conduit means connecting said cylinders, said association of parts providing means whereby an operator on the tractor may control the power lift member thereonduring movement of the tractor and thereby through the provision of the self-contained hydraulic unit to selectively and accurately control the working position on the implement part on an implement connected to the tractor during movement of the tractor and implement.

2'?. In combination with a tractor having an operator's station thereon, a power actuated member on the tractor, means operated from the power plant of the tractor operating said member, means accessible to an operator on said station for controlling said operating means and thereby controlling the position of said power actuated member, means for locking said power operated member in any one of a plurality of adjusted positions, an implement connected to the tractor for movement relative thereto in a plurality of directions, an implement part connected to said implement and movable relative thereto, a member on said implement and connected to said implement part movable to adjust said implement part to thereby control its working position, and a uni-tatry self-contained hydraulic unit including a. cylinder mounted on the tractor and a two-Way piston in the cylinder secured to the power actuated member, a, cylinder secured to the implement having a two-way piston therein secured to lthe implement adjusting member and a pair of .flexible iluid conduit means connecting said cylinders on opposite ends at different sides of the pistons, said associ-ation of parts providing means whereby an operator on the tractor may control the power lift member thereon during movement of the itractor and thereby through the provision of the self-contained hydraulic unit to selectively and accurately control the working position of the implement part on an implement connected to the tractor during movement of the tractor and implement.

28. In combination with a tractor having an operators station thereon, a, power actuated member on the tractor, means operated from the power plant of the tractor operating said member, means accessible to an operator on said station for controlling said operating means and thereby controlling the position of said power actuated member, means for locking said power operated member in any one of a plurality of adjusted positions, an implement iloatingly connected to the tractor for movement relative thereto in a plurality of directions, a functional implement part connected to said implement and movable relative thereto, a member on said implement and connected to said implement part movable to adjust said implement part to thereby control its working position, and a unitary selfcontained hydraulic unit including a` cylinder mounted on the tractor and a piston in the cylinder secured to the power actuated member, a cylinder secured to the implement having a piston therein secured .to the implement adjusting member and flexible uid conduit means connecting said cylinders, said association of parts providing means whereby an operator on the tractor may control the power lift member thereon during movement of the tractor and thereby through the provision of ythe self-contained hydraulic unit selectively and accurately to control the working position of the implement portion on the implement floatingly connected to the tractor during movement of the tractor and implement and during movement of the implement relative to the tractor.

29. In combination with a tractor having an operator's station thereon, a power actuated mempower plant of thev tractor operating said member, means accessible to an operator on said sta- Y Y nected to the tractor for movement relative thereto in a plurality of directions, a functional implement part connected to said implement and movable relative thereto, a member on said implement and connected to said implement part movable to adjust said implement part to thereby control its working position, and a unitary selfcontained hydraulic unit including a cylinder mounted on the tractor and a two-way piston in the cylinder secured to the power actuated member, a cylinder secured to the implement having a two-way piston therein secured to the implement adjusting member and a pair of exible fluid conduit means connecting said cylinders on opposite ends at dierent sidesv of the pistons therein, said association of parts providing means whereby an operator on the tractor may control the power lift member thereon during movement of the tractor and thereby through the provision of the self-contained hydraulic unit selectively and accurately control the working position of the implement part on the implement iloatingly connected to the tractor during movement of the tractor and implement and during movement of the implement relative to the tractor.

30. In combination with a tractor having an operators station thereon, a power actuated member on the tractor, means for operating said member from the power plant of the tractor, means accessible to an operator on said station for controlling said operating means and thereby controlling at will the position of/ said operating means including means for locking said power operated member in any one of a plurality o1 positions, a exlble extensible power actuated device adapted to be utilized with one portion remotely positioned from the tractor, said device including at the remote portion, a cylinder member and a plunger member mounted for reciprocation in the cylinder member, said device further including an extensible power actuated structure mounted on the tractor, said structure including a second cylinder member and a second plunger member mounted for reciprocation in said cylinder member. one of said'second members being mounted on the tractor and the other of said second members being connected to the poweractuated member on the tractor, and a flexible conduit connecting the cylinder member on the tractor-mounted structure with the cylinder member on the extensible device, said conduit providing means for confining a pressure transmitting medium for transmitting power from the plunger member of the tractor-mounted structure to the plunger member of the extensible device, whereby an operator on the tractor may from a remote point by means of the controlling means adjacent the operators station accurately adjust the extensible device.

31. In combination with a tractor having an operators station thereon, a power-actuated member on the tractor, means for operating said member from the power plant of the tractor, means accessible to an operator on said station for controlling said operating means and thereby controlling at will the position of said operating means including meansV for locking said power operated member in any one of a plurality ci' positions, a ilexible extensible power-actuated device adapted to be utilized with one portion remotely positioned from the tractor, said device including at the remote portion a cylinder member and a plunger member mounted forv reciprocation in the cylinder member, said device further including an extensible power-actuated structure mounted on the tractor, said structure including a second cylinder member and a second plunger member mounted for reciprocation in said cylinder member, one oi said second members being mounted on the tractor and the other of said second members being connected to the power-actuated member on the tractor, andl a flexible conduit connecting the cylinder member on the tractor-mounted structure with the cylinder member on the extensible device, said conduit providing means for confining a pressure transmitting medium for transmitting power from the plunger member of the tractor-mounted structure to the plunger member of the extensible device, whereby an operator on the tractor may from a remote point by means of the controlling means adjacent the operators station accurately adjust the extensible device, one of the members of the tractor-mounted structure being pivotally connected to the power-actuated member on the tractor and the other member thereof .being pivotally connected to the tractor whereby by disconnecting said pivotal connections the poweractuated device, the iiexible conduit and the tractor-mounted structure may be removed as a unit.

32. In combination with ya tractor having an operators station thereon, a power-actuated member on the tractor, means for operating said member from the power plant of the tractor, means accessible to an operator on said station for controlling said operating means and thereby controlling at will the position of said operating means including means for locking said power.- operated member in any one of a plurality of positions, a exible extensible power actuated device adaptedto be utilized with one portion remotely positioned from the tractor, said device including at the remote portion a cylinder member and a, plunger member mounted for reciprocation in the-cylinder member, said device further including an extensible Apower actuated structure mounted on the tractor, said structure including a second cylinder member and a second plunger ,member mounted for reciprocation in -said cylinder member. one of said secondmembers being mounted on the tractor and the other of said second members being connected to the power-actuated member on the. tractor, and a flexible uid conduit communicating with the cylinder member on the tractor-mounted structure with the cylinder member on the extensible device, said conduit providing means for confining fluid under pressure for transmitting power from the plunger member of the tractor-mounted structure to the plunger member of the extensible device, whereby an operator y from a remote point by means of the controlling means adjacent the operators station accurately adjust the extensible device.

33. In combination with atractor having an operators station thereon, a power-actuated member on the tractor, means operated from the power plant oi' the tractor for operating said member, means accessible to an operator on said station for controlling said operating means'and thereby controlling the position of said power actuated member, means for locking said poweroperated member against movement in either direction in any one of a plurality of adjusted posion the tractor may tions, an implement connected to the tractor for movement relative thereto in a plurality of directions, an implement part connected to said implement and movable relative thereto, a member on said implement and connected to said implement part movable to adjust said implement part to thereby control its working position, and a iiexible power transmitting unit comprising a structure including a cylindrical casing member and a power transmitting plunger member slidable with respect to said casing member, one of said members being connected to the tractor and the other member being connected to the poweractuated member on the tractor, a second structure including a cylindrical casing member and a power transmitting plunger member slidable with respect to said casing member one of said members being connected to the implement part and the other 4being connected to the implement adjusting member, and power transmitting means including a flexible .conduit connecting the casing member on the tractor mounted structure and the casing member on the implement mounted structure and means within and confined by said conduit for transmitting power from the plunger member of the structure on the tractor to the plunger member of the structure attached to the implement part, whereby an operator on the tractor may selectively and accurately control the working position of the implement part during travel of the tractor and during movement of the implement with respect to the tractor.

34. In .combination with a tractor having an operators station thereon, a power-actuated member on the tractor, means operated from ,the power plant of the tractor for operating said member, means accessible to an operator on said station for controlling said operating means and thereby controlling the position of said power actuated member, means for locking said power operated member against movement in either direction in any one of a plurality of adjusted positions, an implement connected to the tractor for movement relative thereto in a plurality of directions, an implement part connected to said implement and movable relative thereto, a member on said implement and connected to said implement Apart movable to adjust said implement part to thereby control its working position, and a flexible power transmitting unit comprising a structure including a cylindrical casing member and a power transmitting plunger member slidable with respect to said casing member, one of said members being pivotally connected to the tractorand the other member being pivotally connected to the power actuated member on the tractor, a second structure including a cylindrical casing member and a power transmitting plunger member slidable with respect to said casing member, one of said members being pivotally connected to the implement and the other being pivotally connected to the implement adjusting member, and power transmitting means including a flexible conduit connecting the casing lmember on the tractor-mounted structure and the casing member on the implement-mounted structure and means within and confined by said conduit for transmitting power from the plunger member of the structure on the tractor to the plunger member of the structure attached to the implement part, whereby an operator on the tractor may selectively and accurately control the working position of the implement part during travel of the tractor and during movement of the implement with respect to the tractor,

22 said pivotal connections being detachable for removal of the transmitting unit.

35. In combination with a tractor having a` power plant, a structure remotely located from! the tractor and having an adjustable member thereon, a hydraulically operated power-supplying structure on the tractor including means for supplying flud\under pressure, valve mechanism having supply valves and a position operated automatic valve throw-out means, a reservoir and a hydraulically operated device having an operating element movable by fluid delivered to the device, a hydraulically operated device mounted on the remotely located structure and connected to the adjustable member thereon for adjusting the same and having an operating element movable by iiuid delivered to said device, means operable by movement of one of said operating elements arranged to cooperate with said valve throw-out means to operate the same upon a predetermined movement of the said element,

means including' a flexible fluid conduit capable of permitting relative movement of the tractor and the remote structure functionally and structurally connecting said device on the implement to the hydraulic device on the tractor whereby said devices move concurrently, manual control means on the tractor, actuating means connecting said control means with the valve mechanism, said valve mechanism including means operable by said actuating means to selectively open the supply valves to supply iluid under pressure for operating the tractor-mounted hydraulic device\ to move the said operating element thereof yin either of two directions and to thereby operate the hydraulic device on the remote structure and the operating element thereof in corresponding directions, the valve throw-out means being operable to automatically cut oilr the supply of fluid to the tractor-mounted hydraulically-operated device after a predetermined distance of movement of one of the operating elements whereby movement of the tractor mounted device simultaneously initiates, controls and stops actuation of the device on the remote structure and movement of the adjustable member thereon.

36. A device as set forth in claim 35 in which the hydraulically operated device onv the tractor is a pump device delivering fluid under pressure to the flexible conduit and in which the hydraulically operated device on the remote device is a reciprocating cylinder and piston device.

37. In combination with a tractor having a power plant, an implement flexibly connected to the tractor and having an adjustable member thereon, a hydraulically operated power-supplying structure on the tractor including fluid supply means adapted to be supplied by the power plant, valve mechanism having supply valves and a position operated automatic valve throw-out means, a reservoir and a hydraulically operated device having an operating element movable by uid delivered to the device, means operable by movement of said element arranged to cooperate with said valve throw-out means to operate the same upon a predetermined movement of the element, a hydraulically operated `device mounted on the implement and connected to the adjustable member thereon for adjusting the same, means including a flexible fluid conduit capable of permitting relative movement of the tractor and implement functionally and structurally connecting said device on the implement to the hydraulic device on the tractor whereby said devices move concurrently, manual control means on the trac- 23 tor, actuating means connecting said control means with the valve mechanism, said valve mechanism including means operable by said actuating m/eans to selectively open the supply valves to supply fluid under pressureV for operating the tractor-mounted hydraulic device to move the said operating element thereof in two directions and to thereby operate the hydraulic device on the implement in corresponding directions, the valve throw-out means being operable to automatically cut oil the supply of fluid to the tractor-mounted hydraulically-operated device after a predetermined distance of movement of the operating element whereby movement of the tractor-mounted device simultaneously initiates, controls and stops actuation of the implement-mounted device and movement of the adjustable member thereon.

38. A- power-actuated device for a movable member of an adjusting device exibly connected to a tractor having a vpower plant comprising in combination a hydraulically-operated structure adapted to be mounted on such tractor, said structure including a hydraulic pump adapted to be continuously driven by the power plant of such tractor, a hydraulic motor operable in two directions, valve structure for regulating the supply of fluid from the pump to said motor for driving the motor in either of said two directions, means including a, cylinder and piston adapted to be associated with such adjusting device and operatively connectible to the movable member thereof, means including a flexible conduit constructed to confine a pressure-transmitting rnedium operatively connected between the hydraulic motor and the cylinder and piston means, and means including said conduit for transmitting movement to the piston and cylinder means proportional to and concurrently with movement of the hydraulic motor.

39. A power-actuated device for a movable member on an implement flexibly connected to a tractor having a power plant comprising in combination a hydraulically operated structure adapted to be mounted on the tractor, said structure including a hydraulic pump adapted to be continuously driven by the power plant of the tractor, a hydraulic motor operable in two directions, valve structure including valves for regulating the supply of uid from the pump to said motor for driving the motor in either of said two directions, said hydraulically operated structure including an element movable with the operation of said motor, and operatively associated with the valve of the valve structure, a cylinder and piston device adapted to be mounted on the implement and operatively connected to the movable member thereof, means including a exible conduit constructed to confine a pressure transmitting medium, said conduit being connected between the hydraulic motor on the tractor and the cylinder and piston device on the implement and operative to transmit fluid therebetween, and means including said conduit for transmitting movement to said piston and cylinder device proportional to th'e movement of the tractor-mounted hydraulic motor and concurrently with such movement.

40. In combination with a tractor having an operators station therein and a power plant, an implement flexibly connected to the tractor, a hydraulically operated power supplying structure on the tractor including ahydraulic supply means on the tractor adapted to be supplied from the power plant thereof, valve mechanism having 24 supply valves and automatic valve throw-out means, a. reservoir and a hydraulically operated device having an operating element movable in either direction by iiuid delivered to the device distances proportionate to the fluid delivery thereto, fluid conduits connecting thensupply means with said structure, a hydraulically operated device mounted on the implement and connected to a movable element thereon for adjusting the same, means including flexible fluid conduits capable of permitting normal movement of the implement connecting the hydraulic device on the implement to the hydraulic device on the tractor, manual control means adjacent the operators station on the tractor, actuating means connecting said control means with the valve mechanism, said valve mechanism including means operable by said actuating means to selectively open the supply valves to supply fluid pressure from the pump to operate the tractor-mounted hydraulic device, thereby selectively moving the operating element in either direction and simultaneously actuating the hydraulic device on the implement through a proportionate range, the valve .throw-out means being operable to automatically cut oi the supply of uid when the operating element is moved a distance proportionate to the movement of the manual control means whereby the operator has indexing control of the adjustable element on the implement,

and said valve means also including means to hydraulically lock the hydraulic device on the tractor'upon the actuation of said cut-oil means thereby locking the hydraulic device on the implement. v

41. In combination with a tractor having an operators station therein and a power plant, an implement flexibly connected to the tractor, a hydraulically operated power supplying structure on the tractor including a hydraulic supply means on the tractor adapted to be supplied from vthe power plant thereof, valve mechanism having supply valves and automatic valve throw-out means, a reservoir and a hydraulically operated device having an operating element movable in either direction by liquid delivered to the device (distances proportionate to the liquid delivery thereto, liquid conduits connecting the supply means with said structure, ahydraulically operated cylinder and piston device mounted on the implement and connected to a movable element thereon for adjusting the same, means includ- .ing a iiexible liquid conduit capable of permitting normal movement of the implement connecting the hydraulic device on the implement to the hydraulic device on the tractor for the transmission of liquid therebetween, manual control'means adjacent the operators station on the tractor, actuating means connecting said control means with the valve mechanism, said valve mechanism including means operable by said actuating means to selectively open the supply valves to supply iluid pressure from the pump to operate the tractor-mounted hydraulic device, thereby selectively. moving the operating element 'in either direction and simultaneously moving the ,piston in the implement mounted cylinder a proportionate distance, the valve throw-out means being operable to automatically cut oil the supply of fluid when the piston is moved a distance proportionate to the movement of the manual'control means whereby the operator has indexing control of the adjustable element on the implement, and said valve means also including means to hydraulically lock the cylinder 'and piston de- 25 vice on the tractor upon the 'actuation oi' said cut-oil' means thereby locking the cylinder and piston device on the implement.

42. In combination with a tractor having an operators station and a power plant, an implement flexibly connected to the tractor, a hydraulic pump on the tractor adapted to be operated from the power plant, a hydraulically-operated power-supplying structure on the tractor including valve mechanism having supply valves and automatic valve throw-out means and a reservoir and a cylinder and piston device, uid conduits connecting the pump with said structure, a hydraulic cylinder and piston device mounted on the implement and connected to a movable element thereon for adjusting the same, means including iiexible fluid conduits connecting the implement-mounted cylinder and piston device to the tractor-mounted cylinder and piston device, manual control means adjacent the operator's station, operating means connecting said control means with the valve mechanism, said valve mechanism including means operable by said operating means to selectively open the supply valves to supply uid pressure from the pump to either end of the tractor-mounted cylinder, thereby selectively moving the piston therein in either direction and simultaneously moving the piston in the implement-mounted cylinder a proportionate distance, the valve throw-out means being operable to automatically cut oil the supply of fluid when the one oi' the pistons is moved a distance proportionate to the movement of the' manual control means whereby the operator has indexing control of the adjustable element on the implement. and said valve means also including means to hydraulically lock the tracto1 y mounted cylinder and piston device upon the actuation of said throw-out means thereby hydraulically locking the cylinder and piston device on the implement and to simultaneously bypass liquid delivered from the pump to the reservoir at low pressure.

43. A power adjusting device for a movable member of a structure, said structure being remotely located with respect to a tractor, comprising means providing a source oi.' fluid under pressure adapted to be mounted on the tractor,

power means adapted to be mounted on the tractor including s, uid metering means in the form of a fluid-actuated device operable in either of two directions, valve structure for supplying fluid under pressure to said device, said device including an operating element operable in either of two directions during functioning oi' the device in opposite directions, means interconnecting said element and the valve structure constructed and arranged to stop the supply of uid to the said device when the element reaches a predetermined position thereby stopping the operation oi' said fluid-actuated device. a iiuid motor mounted on the remotely located structure and connected to the movable member thereof, flexible fluid conduit means connecting said motor to the operating element of the fluid-actuated device constructed and arranged to deliver fluid to the motor in amounts proportional to the delivery of fluid to the duid-actuated device, a manual control means on the tractor for actuating the valve structure whereby an operator on the tractor may initiate action of the fluid-actuated device with corresponding movement of the remote motor proportionate to the movement of the iiuidactuated device.

44. A power adjusting device for an implement having a movable member thereon and adapted to be flexibly connected to a tractor comprising, means providing a source of iluid under pressure adapted to be mounted on the tractor, power means adapted to be mounted on the tractor including a fluid-actuated device operable in either of two directions, valve structure for supplying iluid under pressure to said device, said device including an operating element operable in either of two directions during functioning of the motor in opposite direction, cut-off meansoperating between said element and the valve structure constructed and arranged to stop the supply of iluid to the Huid-actuated device when the member reaches a predetermined position thereby stopping the operation of the primary fluid motor, a iluid motor mounted on the implement and connected to the movable member thereof, flexible uid conduit means connecting said motor to the operating element of the uid-actuated device constructed and arranged to deliver iluid to the motor in amounts proportional to the delivery of iluid to the duid-actuated device, manual control means on the tractor for actuating the valve structure whereby an operator on the tractor may initiate action of the uuid-actuated device with` corresponding movement o! the motor proportionate to the movement of the fluid-actuated device, said cut-oit means providing for and automatically discontinuing operation of the fluidactuated device at a predetermined point with consequent stopping of the adjusting movement of the motor on the implement.

. RUSSEL D. ACTON.

REFERENCES crran.

The following references are of record in the ille of this patent:

UNITED STATS PATENTS Number Name Date 217,506 Benson July 15, 1879 1,393,619 Geraldson Jan. 10, 1933 1,929,804 Brown Oct. 10, 1933 1,969,684 Bird Aug. 7, 1934 2,072,111 Keeler Mar, 2, 1937 2,076,673 Roper Apr. 13, 1937 2,239,029 Barrett Apr. 22, 1941 2,264,575 Knapp et al. Dec. 2, 1941 2,283,377 Lindgren et al. May 19, 1942 2,290,245 Mott July 21, 1942 2,319,492 Dewey May 13, 1943 FOREIGN PATENTS Number Country Date 108,038 Australia July 19, 1939 539,003 Great Britain A118. 25, 1941 

